# Ch 15: Magnetism in Physics

Watch video lessons on magnetism in physics and learn about the surprising relationship between magnetic fields and electrically charged particles. Each lesson is accompanied by a short multiple-choice quiz you can use to check your understanding of these physics topics.

## Magnetism in Physics - Chapter Summary and Learning Objectives

This chapter is designed to provide you with an introduction to magnetism, one of the four basic interactions found in the natural world. Along with learning how magnets work, you'll find out how the moving subatomic particles, known as electrons, create magnetic fields. The instructor will also explain the principle of electromagnetic induction, whereby a magnetic field can generate an electromotive force in an electrical conductor.

Electric motors and generators will also be covered, showing how they convert between mechanical energy and electrical energy. You'll also become familiar with the key formulas and laws associated with electromagnetism, such as Maxwell's equations. When you finish this chapter, you should understand the following:

• How magnetic forces and fields work
• The relationship between magnetic forces and moving charged particles
• Faraday's Law of Electromagnetic Induction and how magnetic fields and electrical circuits can create an electromotive force
• How Biot-Savart's equation can be used to calculate a magnetic field created by an electrical current
• Ampere's circuital law and the relationship between electrical currents and magnetic fields
• The real-world applications of electrical currents and magnetism

VideoObjectives
Magnetic Force: Definition, Poles and Dipoles Explain magnetic force, including how like poles repel, opposite poles attract and how poles always exist in pairs.
What is a Magnetic Field?Describe magnetic fields, including the shape and direction of field lines. Consider why magnetic field strength is strongest at the poles. Examine magnetic domains in natural magnets and other materials that can be magnetized.
How Magnetic Fields Are CreatedExplain how magnetic fields are created by moving charges. Discuss electromagnets and the factors affecting field strength.
How Magnetic Forces Affect Moving ChargesUnderstand how a moving charged particle is affected by a magnetic field, and describe its practical applications.
Electromagnetic Induction: Definition and Variables that Affect InductionUnderstand how a magnet can be used to induce a voltage in a conductor, and examine the variables that affect induction.
Electromagnetic Induction: Conductor to Conductor and TransformersUnderstand how current in one conductor can cause a voltage in another conductor. Discuss the variables that affect induction and how electrical transformers convey energy.
Electric Motors and GeneratorsExamine how electric motors and generators convert between electrical energy and mechanical energy.
Faraday's Law of Electromagnetic InductionDescribe Faraday's experiments and his law of electromagnetic induction.
The Biot-Savart LawDiscuss the Biot-Savart Law.
Ampere's LawExplain Ampere's Law.
Maxwell's EquationsDiscuss and apply Maxwell's Equations.

11 Lessons in Chapter 15: Magnetism in Physics
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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